funny you should mention something I think I may have on my twilight zone. the clock target is acting a little strange. it kind of gets stuck on or something and if I test it I the switch test a whole row can activate. if I move the plastic target part a little left or right while the stack remains stationary the problem goes away. move it back a little and the whole row lights up. obviously during game play this garget can either work or not depending on the type of ball strike.

could this be similar in problem and if so, is the solution replacing parts of the stack?

thanks